Acme Resin Corporation

Borden Chemical, Inc.

Borden, Inc.

Huttenes-albertus Chemische Werke Gmbh

Robert A Laitar

Michael M Geoffrey

Raja Iyer

Rasik C Shah

Eduardo Gomez

Marek A Torbus

Kwok-tuen Tse

Milan Knezevic

Nicolas Egeler

Leonid S Zaretskiy

Wolfgang Seelbach

Douglas M Trinowski

Brian K Teeter

Gee Ho Bae

Eduardo Gmez

This invention relates to a resin preparable by reaction of a phenol/formaldehyde novolak with tetraethyl orthosilicate in a mass ratio above 28:1, wherein the phenol of the phenol/formaldehyde novolak is substituted or unsubstituted hydroxybenzene or a mixture of two or more such phenols, and to a particulate material coated with said resin. Said particles can be used e.g. in the shell molding process for the production of shell molds and shell cores; and as proppants for use in the hydraulic fracturing process.

Silicic ester modified phenol/formaldehyde novolaks and their use for the production of resin coated substrates

An embodiment of the present invention provides a method for improving the tensile strength of foundry cores and molds. More particularly, an embodiment of the present invention provides an improved binder for foundry cores and molds that include a fluoride bearing acid in combination with an inorganic silicon compound. Alternately, the improved binder may include a fluoride bearing acid in combination with a boron compound. In a preferred embodiment, a modified part 1 binder component includes a combination of hydrofluoric acid and an inorganic silicon compound.

Method to improve humidity resistance of phenolic urethane foundry binders

Two or more sand additive particles are made to adhere to each other, using a binder. The finished product consists of free-flowing particles that are composed of the additive particles bound together by the binder. These bound additive particles may then be applied to sand, such as foundry sands, where, otherwise, multiple additions of additive might need to be made. The pH of the single additive particles can be controlled and separation of the additives due to different specific gravities can be avoided. Various mixtures of different additives are disclosed. Methods of controlling particle size of additive particles, tendency to generate dust, degrade tensile strength or control thermal expansion of foundry cores or molds by using bound additive particles are also disclosed.

Bound multi-component sand additive

A resin is prepared by the reaction of a phenol, an aldehyde and an aliphatic hydroxy compound containing two or more hydroxy groups per molecule in the presence of a divalent metal ion catalyst. These resins react with polyisocyanates to form polyurethanes that are useful binders for foundry cores and molds.

Low free formaldehyde phenolic polyol formulation

An adhesive paste for adhering two or more objects, a composite assembly comprising two or more elements bonded by such paste, and a process for preparing cast metal articles using such paste are provided. The adhesive paste comprises an aqueous solution of a specific alkali phenol-formaldehyde resin and a hardener for that resin, wherein the paste prepared by mixing the resin and hardener has a viscosity, as mixed, in the range of about 1,000 cps to about 15,000 cps. The composite assembly comprises at least two separate elements bonded by the adhesive paste of the invention. The process uses a mold or core assembly having at least two separate elements. The elements are bonded by applying a coating of the paste of the invention to a surface which is to be bonded to a surface of a different element; placing the surfaces in confronting, engaging relationship and allowing an adhesive bond to form; introducing molten metal into the mold assembly or around the core assembly; allowing the molten metal to harden; and removing the bonded mold or core assembly.

Phenolic resin adhesive pastes, assemblies prepared therefrom, and

An alkoxy-modified phenolic resole resin providing an improved binder for foundry cores and molds. The resin has predominantly ortho-ortho benzylic ether bridges joining the phenolic nuclei in the resin and at least one alkoxymethylene group for every 20 phenolic nuclei.

Resin binders for foundry sand cores and molds

A process for preparing an alkoxy-modified phenolic resole resin useful as the polyhydroxy component of a urethane binder composition. A phenol is reacted with a molar excess of an aldehyde in the presence of an alkaline catalyst and the resulting product is further reacted with a monohydric aliphatic alcohol under acidic conditions.

Process for preparing foundry cores and molds

Esters of alkoxy acids, particularly those of 3-alkoxypropionic acids are used as part or all of the polar solvent in solvent systems for binder compositions containing phenolic resins and polyisocyanates.

Binder compositions containing phenolic resins and esters of alkoxy acids

Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and an alkoxy modified phenolic resole resin having at least one alkoxy methylene group for every 20 phenolic hydroxyl groups.

Refractory binders

Process for preparing alkoxy-modified phenolic resole resins

A foundry binder composition which provides foundry cores and molds of superior hot strength comprises a polyisocyanate, a polyhydroxy component and a catalyst. The polyhydroxy component is an alkoxy modified phenolic resole resin containing at least one alkoxy methylene group for every six phenolic nuclei in the resin.

Polyurethane binder compositions

A polyisocyanate component useful in polyurethane binder compositions is provided. The polyisocyanate component incorporates organic phosphorous compounds that impart longer bench life to the binders making them more useful for prepraring moldable compositions such as foundry cores and molds.

Polyisocyanate compositions useful for polyurethane binders

An improved polyurethane binder system is provided which incorporates organic phosphorous compounds that impart longer bench life to the binders making them more useful for preparing moldable compositions such as foundry cores and molds.

Growing community of inventors

Woodridge, IL, United States of America

Robert A Laitar